Returns the fields an action target names: a hide action's T or a submit-form or reset-form action's Fields
element. A name gives every field with that fully qualified name; a dictionary gives the field it is, or the field of a widget.
public IReadOnlyList<PdfField> FindFields(PdfActionTarget target)
The target.
ISO 32000-2 §12.6.4.11, Table 214, and §12.7.6.2-12.7.6.3, Tables 239 and 241; names per §12.7.4.2. Descendants are not added.